Danielle F Sumy, Incorporated Research Institutions for Seismology, Seattle, WA, United States, Bonnie Magura, University of Portland, Department of Chemistry and Physics, Portland, OR, United States, Megan L Anderson, Colorado College, Colorado Springs, CO, United States, Cynthia L Pridmore, California Geological Survey Sacramento, Department of Conservation, Sacramento, CA, United States and Jenda A Johnson, Oregon State Univ, CEOAS, Corvallis, OR, United States